Bulletin-board



, UNITED STATESl 4PATENT GFFICE.

ALBERT D. MARBLE, OF SCANDIA, KANSAS.

BULLETIN-BOARD.

SPECIFICATION forming part of Letters Patent No. 236,826, dated January 18, 1881.

Application led October 20, 1880.

To allfwhom it may concern:

Be it known that I, ALBERT D. MARBLE, of Scandia, in the county of Republic, and in the State of Kansas, have invented certain new and useful Improvements in Bulletin- Boards; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification. y i

The nature of my invention consists in the construction of a bulletin-board with a series or number of blocks containing letters and iigures, as also blank blocks, which may be placed in a frame and` secured in proper place by suitable mechanical means, as will be hereinafter more fully set forth.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

In the annexed drawings, making part-of this specification, Figure l represents a perspective of my board; Fig. 2, a perspective of one of the blocks; and Fig. 3 a section of the board, showing one mode of securing the blocks in place.

In the figures, A represents a box-frame, which is divided into a series of compartments by means of the partition-boards a; These compartments run crosswise of the frame, and are snfiiciently wideto contain blocks C9, upon which are letters and iigures, as will be more fully set forth. The compartments will, ot' course, vary in size, according to the size of blocks tobe used. Qne of the blocks is seen in Fig. 2. This block is a cube, and, of course, sixsided. Letters are formed upon three sides, figures upon two sides, and one side is left blank. The marking, however, can be varied to suit the nature of the case. I use with the lettered blocks blank blocks c, in order to separate words, and these may be made less in diameter than the lettered blocks.

In Fig. 3 will be seen small springs e, placed in the ends ofthe compartments, which are intended to press against the blocks for the purpose of keeping them in place.

(No model.)

In Fig. 1 may be seen set-screws a a, which pass through the sides of the frame, and are also for the purpose of securing the blocks in the compartments.

It will be perceived that the springs, while holding the blocks in place, will permit them to be moved to one side, so as to change the blocks quickly and conveniently. This is extremely important in a bulletin-board where changes have to be made often, and in some cases with great dispatch, and could not be accomplished by the usual fastening devices employed for holding the blocks in place in the movable signs and various educational devices in use. The set-screws permit the blocks to be adjusted as the springs'become weakened from use, thus providing for securely holding the blocks at all times.

It will readily be seen that by this construction I may make a bulletin-board for-advertising or other purposes which can be readily changed so as to admit of a change in the matter to be placed upon it.

The frame A may either be secured to a building permanently, or it may have a supporting back frame, B, which will allow it to be placed in any inclined position required.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A ,bulletin-board consisting of a rectangular box provided with a series of horizontal compartments, into which are adapted to fit a series of cubical blocks with the necessary blank, lettered, or gured faces, the said compartments being provided with springs at one end and set-screws at the other, whereby the 'blocks are confined by adj ustable spring-pressure, so that they may readily be removed and changed, substantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand this 5th day of 9o October, 1880.

ALBERT D. MARBLE.

Witnesses:

WELIAM H. WooDwARD. SAMUEL L. PASKHILL. 

